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      1 /*
      2  * SGI FREE SOFTWARE LICENSE B (Version 2.0, Sept. 18, 2008)
      3  * Copyright (C) 1991-2000 Silicon Graphics, Inc. All Rights Reserved.
      4  *
      5  * Permission is hereby granted, free of charge, to any person obtaining a
      6  * copy of this software and associated documentation files (the "Software"),
      7  * to deal in the Software without restriction, including without limitation
      8  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
      9  * and/or sell copies of the Software, and to permit persons to whom the
     10  * Software is furnished to do so, subject to the following conditions:
     11  *
     12  * The above copyright notice including the dates of first publication and
     13  * either this permission notice or a reference to
     14  * http://oss.sgi.com/projects/FreeB/
     15  * shall be included in all copies or substantial portions of the Software.
     16  *
     17  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
     18  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
     19  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
     20  * SILICON GRAPHICS, INC. BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
     21  * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF
     22  * OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
     23  * SOFTWARE.
     24  *
     25  * Except as contained in this notice, the name of Silicon Graphics, Inc.
     26  * shall not be used in advertising or otherwise to promote the sale, use or
     27  * other dealings in this Software without prior written authorization from
     28  * Silicon Graphics, Inc.
     29  */
     30 
     31 /*
     32  * reader.h
     33  *
     34  */
     35 
     36 #ifndef __glureader_h_
     37 #define __glureader_h_
     38 
     39 #include "bufpool.h"
     40 #include "types.h"
     41 
     42 enum Curvetype { ct_nurbscurve, ct_pwlcurve, ct_none };
     43 
     44 struct Property;
     45 struct O_surface;
     46 struct O_nurbssurface;
     47 struct O_trim;
     48 class O_pwlcurve;
     49 struct O_nurbscurve;
     50 struct O_curve;
     51 class  Quilt;
     52 class TrimVertex;
     53 
     54 
     55 struct O_curve : public PooledObj {
     56     union {
     57         O_nurbscurve	*o_nurbscurve;
     58         O_pwlcurve	*o_pwlcurve;
     59     } curve;
     60     Curvetype		curvetype;	/* arc type: pwl or nurbs	*/
     61     O_curve *		next;		/* next arc in loop		*/
     62     O_surface *		owner;		/* owning surface		*/
     63     int			used;		/* curve called in cur surf	*/
     64     int			save;		/* 1 if in display list		*/
     65     long		nuid;
     66     			O_curve() { next = 0; used = 0; owner = 0;
     67 				    curve.o_pwlcurve = 0; curvetype = ct_none; save = 0; nuid = 0; }
     68     };
     69 
     70 struct O_nurbscurve : public PooledObj {
     71     Quilt		*bezier_curves;	/* array of bezier curves	*/
     72     long		type;		/* range descriptor		*/
     73     REAL		tesselation;	/* tesselation tolerance 	*/
     74     int			method;		/* tesselation method 		*/
     75     O_nurbscurve *	next;		/* next curve in list		*/
     76     int			used;		/* curve called in cur surf	*/
     77     int			save;		/* 1 if in display list		*/
     78     O_curve *		owner;		/* owning curve 		*/
     79 			O_nurbscurve( long _type )
     80 			   { bezier_curves = 0; type = _type; tesselation = 0; method = 0; next = 0; used = 0; save = 0; owner = 0; }
     81     };
     82 
     83 class O_pwlcurve : public PooledObj {
     84 public:
     85     TrimVertex		*pts;		/* array of trim vertices	*/
     86     int			npts;		/* number of trim vertices	*/
     87     O_pwlcurve *	next;		/* next curve in list		*/
     88     int			used;		/* curve called in cur surf	*/
     89     int			save;		/* 1 if in display list		*/
     90     O_curve *		owner;		/* owning curve 		*/
     91 			O_pwlcurve( long, long, INREAL *, long, TrimVertex * );
     92     };
     93 
     94 struct O_trim : public PooledObj {
     95     O_curve		*o_curve;	/* closed trim loop	 	*/
     96     O_trim *		next;		/* next loop along trim 	*/
     97     int			save;		/* 1 if in display list		*/
     98 			O_trim() { next = 0; o_curve = 0; save = 0; }
     99     };
    100 
    101 struct O_nurbssurface : public PooledObj {
    102     Quilt *		bezier_patches;/* array of bezier patches	*/
    103     long		type;		/* range descriptor		*/
    104     O_surface *		owner;		/* owning surface		*/
    105     O_nurbssurface *	next;		/* next surface in chain	*/
    106     int			save;		/* 1 if in display list		*/
    107     int			used;		/* 1 if prev called in block	*/
    108 			O_nurbssurface( long _type )
    109 			   { bezier_patches = 0; type = _type; owner = 0; next = 0; save = 0; used = 0; }
    110     };
    111 
    112 struct O_surface : public PooledObj {
    113     O_nurbssurface *	o_nurbssurface;	/* linked list of surfaces	*/
    114     O_trim *		o_trim;		/* list of trim loops		*/
    115     int			save;		/* 1 if in display list		*/
    116     long		nuid;
    117 			O_surface() { o_trim = 0; o_nurbssurface = 0; save = 0; nuid = 0; }
    118     };
    119 
    120 struct Property : public PooledObj {
    121     long		type;
    122     long		tag;
    123     REAL		value;
    124     int			save;		/* 1 if in display list		*/
    125 			Property( long _type, long _tag, INREAL _value )
    126 			{ type = _type; tag = _tag; value = (REAL) _value; save = 0; }
    127 			Property( long _tag, INREAL _value )
    128 			{ type = 0; tag = _tag; value = (REAL) _value; save = 0; }
    129     };
    130 
    131 class NurbsTessellator;
    132 #endif /* __glureader_h_ */
    133